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import * as React from "react";
import {observable, action} from "mobx";
import {observer} from "mobx-react";
import "./TimelineOverview.scss";
interface TimelineOverviewProps{
totalLength: number;
visibleLength:number;
visibleStart:number;
currentBarX:number;
isAuthoring: boolean;
changeCurrentBarX: (pixel:number) => void;
movePanX: (pixel:number) => any;
}
@observer
export class TimelineOverview extends React.Component<TimelineOverviewProps>{
@observable private _visibleRef = React.createRef<HTMLDivElement>();
@observable private _scrubberRef = React.createRef<HTMLDivElement>();
private readonly DEFAULT_HEIGHT = 50;
private readonly DEFAULT_WIDTH = 300;
@action
onPointerDown = (e:React.PointerEvent) => {
e.stopPropagation();
e.preventDefault();
document.removeEventListener("pointermove", this.onPanX);
document.removeEventListener("pointerup", this.onPointerUp);
document.addEventListener("pointermove", this.onPanX);
document.addEventListener("pointerup", this.onPointerUp);
}
@action
onPanX = (e: PointerEvent) => {
e.stopPropagation();
e.preventDefault();
let movX = (this.props.visibleStart / this.props.totalLength)* (this.DEFAULT_WIDTH) + e.movementX;
this.props.movePanX((movX / (this.DEFAULT_WIDTH )) * this.props.totalLength);
}
@action
onPointerUp = (e: PointerEvent) => {
e.stopPropagation();
e.preventDefault();
document.removeEventListener("pointermove", this.onPanX);
document.removeEventListener("pointerup", this.onPointerUp);
}
@action
onScrubberDown = ( e:React.PointerEvent) => {
e.preventDefault();
e.stopPropagation();
document.removeEventListener("pointermove", this.onScrubberMove);
document.removeEventListener("pointerup", this.onScrubberUp);
document.addEventListener("pointermove", this.onScrubberMove);
document.addEventListener("pointerup", this.onScrubberUp);
}
@action
onScrubberMove = (e: PointerEvent) => {
e.preventDefault();
e.stopPropagation();
let scrubberRef = this._scrubberRef.current!;
let left = scrubberRef.getBoundingClientRect().left;
let offsetX = Math.round(e.clientX - left);
this.props.changeCurrentBarX((offsetX / (this.DEFAULT_WIDTH) * this.props.totalLength) + this.props.currentBarX);
}
@action
onScrubberUp = (e:PointerEvent) => {
e.preventDefault();
e.stopPropagation();
document.removeEventListener("pointermove", this.onScrubberMove);
document.removeEventListener("pointerup", this.onScrubberUp);
}
render(){
let timeline = this.props.isAuthoring ? [
<div key="timeline-overview-container" className="timeline-overview-container">
<div ref={this._visibleRef} key="timeline-overview-visible" className="timeline-overview-visible" style={{left:`${(Math.round(this.props.visibleStart) / Math.round(this.props.totalLength)) * 296}px`, width:`${(Math.round(this.props.visibleLength) / Math.round(this.props.totalLength)) * 296}px`}} onPointerDown={this.onPointerDown}></div>,
<div ref={this._scrubberRef} key="timeline-overview-scrubber-container" className="timeline-overview-scrubber-container" style={{left:`${(this.props.currentBarX / this.props.totalLength) * 294}px`}} onPointerDown={this.onScrubberDown}>
<div key="timeline-overview-scrubber-head" className="timeline-overview-scrubber-head"></div>
</div>
</div>
] : [
<div className="timeline-play-bar">
<div ref={this._scrubberRef} className="timeline-play-head" style={{left:`${(this.props.currentBarX / this.props.totalLength) * 294}px`}} onPointerDown={this.onScrubberDown}></div>
</div>,
<div className="timeline-play-tail" style={{width: `${(this.props.currentBarX / this.props.totalLength) * 294}px`}}></div>
];
return(
<div>
{timeline}
</div>
);
}
}
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